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c# .net DateTime without Time

Posted on 2011-03-02
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Last Modified: 2012-05-11
Is there a way of setting a DateTime, and persisting that to SQL Server DateTime field and distinguish between those with times and those without, without using a 'special' time like midnight?
E.g. I want a datetime field to hold NextAppointmentDate, which may or may not have a Time, but I don't want to store a seperate Time field, is that possible?
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Question by:Silas2
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Expert Comment

by:s_chilkury
ID: 35016877
I think this question is in regards of SQL DateTime field.

If you wish to store a date (NextAppointmentDate) then you need to store that in Date field in case of SQL Server 2008. This is not the case with SQL Server 2005 or less. In that case you need to store date field excluding time specifying the time as 00:00:00.
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by:Silas2
ID: 35016939
You can't say 'the time element is null' somehow? Its just that someone might want to use midnight.
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by:s_chilkury
ID: 35017065
Yes, for SQL Server 2005 or below versions we dont have time element as NULL. But with SQL Server 2008 we have a new datatype which is date and time as separate datatypes.
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by:Jini Jose
ID: 35017125
you can use the datetime field.
and while passing the datetime value from c# you can format it with yyyy-Mm-dd hh:mm:ss.

if it has time then the datetime value will be like this 2011-Mar-03 10:20:33
and if it not has time then the datetime value will be like this 2011-Mar-03 00:00:00

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by:Silas2
ID: 35017898
Yes gmailjini: but that is midnight, isn't it? Say someone wanted to use midnight? wouldn't that get confused with 'time=null'?
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Accepted Solution

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Todd Gerbert earned 125 total points
ID: 35022259
The answer is that you need two separate fields in your database to accomplish this, one for Date and one for Time. .Net has no notion of a date-only type.

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